Iron carbonate acid soluble weighting agent for well...

Details Iron carbonate acid soluble weighting agent for well... Iron carbonate acid soluble weighting agent for well...

C - Chemistry, Metallurgy

09

K

31/8

C09K 8/03 (2006.01)

Patent

CA 1057942

ACID SOLUBLE WEIGHTING AGENT FOR WELL DRILLING, WORKOVER AND COMPLETION FLUIDS Abstract of the Disclosure. A new weighting material for use in controlling the specific gravity of fluids employed in the drilling, completion, perforation and workover of oil and gas wells is disclosed. The material siderite (FeCO3), has the unique pro- perty of being removable from the bottom of well boreholes and pro- ducing formation zones by virtue of almost complete solubility in both mineral and organic acids. This weighting material is compat- ible in both oil and water muds and has a density of 3.8 g/cc which allows formulation of fluid weights up to 19 lbs/gal.

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